"The world is moving faster, it's getting more competitive, not less, and I think those who are dominant in their prior generation are really going to have a hard time moving into this newer generation," Eric Jackson of Ironfire Capital told CNBC
Jackson identifies three generations of web companies: web portals, such as Yahoo; social websites, such as Facebook; and the emerging mobile web.
"Facebook can buy a bunch of mobile companies, but they are still a big, fat website and that's different from a mobile app."
Last month, Facebook warned its ability to generate revenue from its mobile platform remains unproven, reports Bloomberg
. The problem will only become more significant as web users switch to mobile technologies.
The company issued a similar warning earlier this year when it released a list of 35 "risk factors"
that could "materially and adversely affect" Facebook. The list was included as part of its legally required initial public offering filing with the Securities and Exchange Commission.
Facebook Inc. continued its decline since its initial pubic offering last month. Shares closed at a new all-time low of $25.87. The stock has declined 32 percent since it began trading May 18.